This Friday impromptu public parks will be springing up around the world for PARK(ing) Day 2009! Created by San Francisco art collective REBAR, this one-day celebration of public space encourages people in cities around the globe to transform metered parking spots into temporary public parks. From pavement-faring pirate ships to mobile meadows we’ve seen some incredible projects in the past, and we can’t wait to hit the streets again this September 18th. Anyone can participate, so if you’d like to set up your own park head on over to Parkingday.org to get the scoop.